package chapter1_2_Data_Abstraction;

import algs4.StdDraw;

public class VisualAccumulator {
    private double total;
    private int N;
    
    public VisualAccumulator(int trials, double max) {
        StdDraw.setXscale(0, trials);
        StdDraw.setYscale(0, max);
        StdDraw.setPenRadius(.005);
    }
    
    public void addDataValue(double val) {
        N++;
        total += val;
        StdDraw.setPenColor(StdDraw.DARK_GRAY);
        StdDraw.point(N, val);
        StdDraw.setPenColor(StdDraw.RED);
        StdDraw.point(N, mean());
    }
    public double mean() {
        return total / N;
    }
    public String toString() {
        return "Mean (" + N + " values): " + String.format("%7.5f", mean());
    }
}
